CONTACTLESS POWER TRANSMISSION DEVICE

• US 20120194125A1
• Filed: 01/26/2012
• Published: 08/02/2012
• Est. Priority Date: 02/01/2011
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Kanasugi, Katsumi, Mishio, Yoshihiro, Kanahara, Hirokazu
• Granted Patent: US 9,106,107 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00716 in response to integrated charge or discharge current

Abstract

A contactless power transmission device which transmits electric power in a contactless way includes: a power transmission section which transmits electric power using a primary coil; a power receiving section which is provided in a radio communication device and receives electric power using a secondary coil that is electromagnetically coupled with the primary coil; a housing which shields an electromagnetic wave, in which the power transmission section is provided, and which forms a closed space where the radio communication device is housed; and a housing antenna section which is provided in the housing and transmits a first communication signal to the outside of the housing, or transmits a second communication signal to the inside of the housing, the first communication signal being emitted from the radio communication device housed inside the housing, the second communication signal being emitted from the radio communication device housed outside the housing.

Claims

1. A contactless power transmission device which transmits electric power in a contactless way, comprising:

a power transmission section which transmits electric power using a primary coil;

a power receiving section which is provided in a radio communication device and receives electric power using a secondary coil that is electromagnetically coupled with the primary coil;

a housing which shields an electromagnetic wave, in which the power transmission section is provided, and which forms a closed space where the radio communication device is housed; and

a housing antenna section which is provided in the housing and transmits a first communication signal to the outside of the housing, or transmits a second communication signal to the inside of the housing, the first communication signal being emitted from the radio communication device housed inside the housing, the second communication signal being emitted from the radio communication device housed outside the housing.

2. The contactless power transmission device according to claim 1,

wherein the housing antenna section is formed by an internal antenna section provided inside the housing and an external antenna section which is connected to the internal antenna section and is provided outside the housing, and

the internal antenna section is provided so as to be disposed at a position close to an antenna of the radio communication device when the radio communication device is housed in the housing.

3. The contactless power transmission device according to claim 2,

wherein the external antenna section is provided at a position which is outside the housing and is near the housing.

4. The contactless power transmission device according to claim 1,

wherein a structural material which makes the attenuation of electromagnetic waves in a frequency band for power transmission larger than the attenuation of electromagnetic waves in a frequency band used for communication by the radio communication device is used as a shielding structure material which shields an electromagnetic wave in the housing.

5. The contactless power transmission device according to claim 2,

wherein a structural material which makes the attenuation of electromagnetic waves in a frequency band for power transmission larger than the attenuation of electromagnetic waves in a frequency band used for communication by the radio communication device is used as a shielding structure material which shields an electromagnetic wave in the housing.

6. The contactless power transmission device according to claim 3,

wherein a structural material which makes the attenuation of electromagnetic waves in a frequency band for power transmission larger than the attenuation of electromagnetic waves in a frequency band used for communication by the radio communication device is used as a shielding structure material which shields an electromagnetic wave in the housing.